/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
/************************************************************************
 * kernel/signal/sig_cleanup.c
 *
 *   Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ************************************************************************/

/************************************************************************
 * Included Files
 ************************************************************************/

#include <tinyara/config.h>
#include <tinyara/arch.h>

#include "signal/signal.h"

/************************************************************************
 * Definitions
 ************************************************************************/

/************************************************************************
 * Private Type Declarations
 ************************************************************************/

/************************************************************************
 * Global Variables
 ************************************************************************/

/************************************************************************
 * Private Variables
 ************************************************************************/

/************************************************************************
 * Private Functions
 ************************************************************************/

/************************************************************************
 * Public Functions
 ************************************************************************/

/************************************************************************
 * Name: sig_cleanup
 *
 * Description:
 *   Deallocate all signal-related lists in a TCB.  This function is
 *   called only at task deletion time.  The caller is expected to have
 *   assured the critical section necessary to perform this action.
 *
 ************************************************************************/

void sig_cleanup(FAR struct tcb_s *stcb)
{
	FAR sigactq_t *sigact;
	FAR sigq_t *sigq;

	/* Deallocate all entries in the list of signal actions */

	while ((sigact = (FAR sigactq_t *)sq_remfirst(&stcb->sigactionq)) != NULL) {
		sig_releaseaction(sigact);
	}

	/* Deallocate all entries in the list of pending signal actions */

	while ((sigq = (FAR sigq_t *)sq_remfirst(&stcb->sigpendactionq)) != NULL) {
		sig_releasependingsigaction(sigq);
	}

	/* Deallocate all entries in the list of posted signal actions */

	while ((sigq = (FAR sigq_t *)sq_remfirst(&stcb->sigpostedq)) != NULL) {
		sig_releasependingsigaction(sigq);
	}

	/* Misc. signal-related clean-up */

	stcb->sigprocmask = ALL_SIGNAL_SET;
	stcb->sigwaitmask = NULL_SIGNAL_SET;
}

/************************************************************************
 * Name: sig_release
 *
 * Description:
 *   Deallocate all signal-related lists in a group.  This function is
 *   called only when the last thread leaves the group.  The caller is
 *   expected to have assured the critical section necessary to perform
 *   this action.
 *
 ************************************************************************/

void sig_release(FAR struct task_group_s *group)
{
	FAR sigpendq_t *sigpend;

	/* Deallocate all entries in the list of pending signals */

	while ((sigpend = (FAR sigpendq_t *)sq_remfirst(&group->sigpendingq)) != NULL) {
		sig_releasependingsignal(sigpend);
	}
}
